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@user48628
It’s been two months ago when I bought a GPS tracking bike lamp, which goes under various names: SpyLamp, SpyBike GPS tracking device, XY-B01, XY-B02, etc., with a range of similar models based on exactly the same technical device inside. I bought it directly from a producer in China (it cost me approx. 150 USD, although the initial price to pay, together with the shipping was promised to be 96 USD).
I installed it properly, put a separate SIM card inside etc. The device worked for 3 days in total. ONLY. Then it stopped.
It stopped responding to the so-called master number, i.e. my proper mobile phone which communicates with the SIM card in the GPS tracking lamp. It did not communicate at all for about 3 weeks. Afer I contacted the producer lots of times, the lamp suddenly responded (after everything was reactivated) and started sending SMSes to my master phone number permanently, and then I began to received allert phone calls continuously: 18 phone calls within three hours at night, when everybody was asleep and the bike was just standing there in the next room.
The lamp tracked the position of my bike only for the first three days. Then it stopped for ever.
The vibration sensor in the lamp activates itself at random with no correlation to the vibration in the real world. It begings to blink in the middle of the night or any time of day and night without a reason. However, when the bike is really shaken or in motion, the sensor NEVER reacts.
The producer also ceased to respond to my queries and does not care: there is no help from their side.
So, be aware: the lamp promises a lot (and as an idea it sounds great), but in practice is is USELESS. It’s a waste of money.